KR101912271B1 - Charging apparatus and wireless charging apparatus - Google Patents

Abstract

The present invention relates to a charging device and a wireless charging device which are easy to display a buffer upon recharging of a device buffered by a single color display device, A charging unit for transmitting the charging power from the power supply unit to an external device to be charged; A charging controller for controlling a charging state of the charging unit; A display unit for displaying a charged state according to the control of the charge control unit and stopping the buffer state display operation; And a delay unit for interrupting a current supplied to the display unit in a buffered state when the charging object device is recharged and delaying the display operation stopping of the display unit for a predetermined period of time.

Description

CHARGING APPARATUS AND WIRELESS CHARGING APPARATUS [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device and a wireless charging device that are easy to display a charge.

Generally, in order to drive an electronic device, a power supply device that supplies driving power required for operation is indispensably required.

Such a power supply apparatus can usually convert commercial AC power into driving power, which is DC power, and supply the power to the electronic apparatus.

As described above, in the case where a rechargeable battery for supplying power to the electronic apparatus is supplied by charging the power supply, a recharging apparatus may be employed to supply power to the rechargeable battery.

Such a charging device can be directly connected to an electronic device by a connector or the like to supply power to a rechargeable battery built in the electronic device, or to supply a rechargeable battery built in the electronic device in a noncontact manner by a magnetic induction effect or a self-resonating effect.

Such a charging apparatus may be provided with a display unit such as a light emitting diode to indicate the state of charge.

In the case of a single-color light-emitting diode, when the fully charged electronic device is controlled for a predetermined time and then reconnected, there is a problem that the buffered display of the buffered electronic device can not be performed. There is a problem that the manufacturing cost of the light emitting diode is increased.

Korean Patent Laid-Open No. 10-2009-0113732

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a charging device and a wireless charging device which can easily display a buffered state upon recharging of a device buffered by a monochromatic display device.

According to an aspect of the present invention, there is provided a power supply apparatus including: a power supply unit for supplying a charging power;

A charging unit for transmitting the charging power from the power supply unit to an external device to be charged;

A charging controller for controlling a charging state of the charging unit;

A display unit for displaying a charged state according to the control of the charge control unit and stopping the buffer state display operation; And

And a delay unit for interrupting a current supplied to the display unit and delaying an interruption of a display operation of the display unit for a predetermined period of time in a buffered state when the charging object device is recharged.

According to one technical aspect of the present invention, the display unit may be a monochromatic light emitting diode.

According to one technical aspect of the present invention, the power supply unit may further include a detector for detecting a state of the rechargeable power supplied to the charger.

According to one technical aspect of the present invention, the display unit may emit light of a predetermined color when charging the charging object device, and stop the light emitting operation when the charging object device is fully charged.

According to one technical aspect of the present invention,

A switch connected in series between a cathode of the monochromatic LED and a ground, to which driving power is supplied;

A first resistor connected between a first control signal of the charge control unit and a drain of the switch;

A diode coupled between the drain of the switch and the first resistor to deliver the control signal;

A second resistor coupled between a second control signal of the charge control section and a gate of the switch;

A capacitor coupled between the gate of the switch and the second resistor; And

And a third resistor coupled between the gate of the switch and ground,

The second resistor, the third resistor, and the capacitor may determine the delay time together with the gate-source threshold voltage of the switch.

In order to solve the above-described problems of the present invention, in another technical aspect of the present invention,

A power supply unit for supplying charging power;

A charging unit for transmitting the charging power from the power supply unit to an external device to be charged in a predetermined wireless manner;

A charging controller for controlling a charging state of the charging unit;

A display unit for displaying a charged state according to the control of the charge control unit and stopping the buffer state display operation; And

And a delay unit for interrupting a current supplied to the display unit and delaying an interruption of a display operation of the display unit for a predetermined period of time in a buffered state when the charging object device is recharged.

According to another technical aspect of the present invention,

A coil part for transmitting the charging power to the charging target device according to a magnetic induction effect; And

And a switch unit for controlling the power transmission operation of the coil unit.

According to the present invention, since the display device of the single color is lighted for a certain time upon recharging of the device cushioned by the single color display device, the cushioning display of the device is also easy as a single color display device, There is an effect to be reduced.

In addition, there is an effect that the power consumption efficiency can be increased by reducing the delay time and current consumption when switching from the buffered state to the charged state.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic configuration diagram of a charging device of the present invention; Fig.
Fig. 2 and Fig. 3 are circuit diagrams schematically showing a part of a charging apparatus of the present invention. Fig.
FIGS. 4 to 6 are graphs showing electrical characteristics of a part of the charging apparatus of the present invention shown in FIGS. 2 and 3; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that those skilled in the art can easily carry out the present invention.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The same or similar reference numerals are used throughout the drawings for portions having similar functions and functions.

In addition, in the entire specification, when a part is referred to as being 'connected' with another part, it is not only a case where it is directly connected, but also a case where it is indirectly connected with another element in between do.

Also, to include an element means to include other elements, not to exclude other elements unless specifically stated otherwise.

The terms first and / or second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the right according to the concept of the present invention, the first element being referred to as the second element, The two components can also be named as the first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms "comprises ",or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Fig. 1 is a schematic configuration diagram of a charging apparatus of the present invention.

Referring to FIG. 1, the charging apparatus 100 of the present invention includes a power supply unit 110, a charging unit 120, a charge control unit 130, and a detection unit 140. A display unit 150 and a delay unit 160.

The power supply unit 110 may supply a preset charging power, and may convert input power to the charging power, although not shown, and the input power may be a commercial AC power or a DC power.

To this end, the power supply unit 110 may include a rectifying circuit for rectifying commercial AC power, a power factor correcting circuit for correcting the power factor by adjusting the phase difference between the voltage and the current of the rectified power, and the like.

The charging unit 120 may supply the charging power from the power supply unit 110 to an external charging target device.

When the charging apparatus of the present invention is a general wired charging apparatus, the charging unit 120 may supply charging power to a charging target apparatus connected to a connection terminal such as a connector. In the case of a wireless charging apparatus, The charging power can be supplied to the device to be charged by the self-resonance method or the self-resonance method.

To this end, the charger 120 may include a coil portion 121 and a switch portion 122.

The coil portion 121 may include at least one coil and may supply the charging power source to the charging target device in accordance with a magnetic induction method or a self resonance method set in advance.

To this end, the device to be charged may be provided with a receiving circuit for receiving the charging power from the coil part 121 in accordance with the magnetic induction method or the self-resonance method.

The coil part 121 may include a plurality of coils depending on the power level of the charge power source to be supplied.

The switch unit 122 may switch the amplification action of the coil unit 121 and may include a switch corresponding to the number of coils of the coil unit 121. [

The switching operation of the switch unit 122 can be controlled by the charge control unit 130. [

The charge control unit 130 can control the charging operation of the charging unit 120 and can further control the display of the charging state of the charging object device.

For this purpose, the charge controller 130 may be a microprocessor into which a software code capable of performing the above-described operations is input.

The charging controller 130 can control the charging operation in the following five modes.

In the above-described five modes of charging operation, there are a standby mode in which the power source is connected only first and the charging is not in progress, a power supply mode in which charging is proceeding secondly, a buffering mode in the third charging mode, A fault mode indicating abnormality such as a rise in temperature at the time of charging, and a fifth mode in which a foreign object such as a conductor is detected between a charging device and a charging target device during charging operation, Object Detection (FOD) mode.

The detecting unit 140 can detect the state of the charging power supplied from the power supplying unit 110 to the charging unit 120 and more specifically, It is possible to detect whether it corresponds to a set steady state or a shunt state.

The display unit 150 can display the charging state of the charging target device in accordance with the charging display control of the charging control unit 130. [

More specifically, the display unit 150 may be a monochromatic light emitting diode. According to the charge display control of the charge control unit 130, when the device to be charged is being charged, light of a predetermined color may be emitted. In the fully charged buffer state, the light emission can be stopped.

The above-described display unit 150 can stop the light emission in the buffered state in which the charging target device is fully charged in accordance with the control of the charge control unit 130. However, if the charging target device is charged It may be difficult for the light emitting operation to be stopped to accurately display whether the charging target device and the charging device operate normally or whether the charging target device is in a buffered state.

Accordingly, the delay unit 160 can delay the light emission stop operation of the display unit 150. [

2 and 3 are circuit diagrams schematically showing a part of the charging apparatus of the present invention.

FIG. 2 is a circuit diagram schematically showing a charging control unit 130, a display unit 150 and a delay unit 160 of the charging apparatus of the present invention. FIG. 3 is a circuit diagram of the display unit 150 of the charging apparatus of the present invention shown in FIG. And a delay operation of the delay unit 160 according to an embodiment of the present invention.

2 and 3, the delay unit 160 includes a first resistor, a second resistor and a third resistor R1, R2 and R3, a diode D, a capacitor C and a switch Q. can do.

The driving power source Vcc may be input to the anode of the single color light emitting diode of the display unit 150 and the cathode of the single color light emitting diode of the display unit 150 may be connected in series with the drain of the switch Q, The source can be connected to ground. The switch Q may be an N-type MOS FET.

One end of the first resistor R1 may be connected to a signal terminal for transmitting the first control signal V1 of the signal of the controller 130 and the anode of the diode D may be connected to the other end of the first resistor R1 And the cathode of the diode D is connected to the gate of the switch Q to provide a path through which the second control signal V2 is input to the gate of the switch Q. [

One terminal of the second resistor R2 may be connected to a signal terminal for transmitting the first control signal V1 of the signal of the controller 130. The capacitor C may be connected to the other terminal of the second resistor R2, And the third resistor R3 may be connected in parallel between the gate and the source of the switch Q. In this case,

FIGS. 4 to 6 are graphs showing electrical characteristics of a part of the charging apparatus of the present invention shown in FIG. 2 and FIG. 3;

Referring to FIG. 4 together with FIG. 3, the charging operation mode described above may be displayed by the first and second control signals V1 and V2 from the charge controller 130. FIG.

That is, if the signal levels of the first and second control signals V1 and V2 are respectively the low level, the first standby mode, the first control signal V1 is the high level, and the second control signal V2 is the low level The second power supply mode, the first control signal V1 is at the low level, and the second control signal V2 is at the high level.

The capacitor C is connected in series to the gate terminal of the second resistor R2 and the switch Q to perform a function as a coupling capacitor. In the buffering mode, the capacitor C connected to the gate terminal of the switch Q The voltage level of the second control signal V2 transmitted to the gate of the switch Q is raised to the reference voltage level of the first control signal V1 input to the gate terminal of the switch Q, The monochromatic light emitting diode of the display unit 150 is turned on until the voltage is discharged to 2.3 V, for example, and then extinguished.

The third resistor R3 can form a discharge path of the gate-terminal voltage, and can perform a high-pass filter function to remove low-frequency noise components of several MHz.

Together with the second and third resistors R2 and R3, the capacitor C can adjust the time constant to adjust the delay time described above.

4, the monochromatic light emitting diode of the display unit 150 is turned on by the first control signal V1 (a) and the second control signal V2 (b) and then turned off (c ) This is because the signal transmission is delayed (b, c) according to the delay time determined by the gate-source threshold voltage of the switch Q and the time constant of the second and third resistors R2 and R3 and the capacitor C, , The light emitting diode is automatically turned off after the light emitting diode is turned on for a certain period of time even when the charging target device is recharged, thereby displaying the buffering state.

Referring to FIG. 5, it can be seen that the monochromatic light emitting diode of the display unit 150 is lit up without a delay time when the power of the device to be charged is consumed in the buffering mode and the power supply mode is again performed.

6, when the current at the drain terminal of the switch Q is measured in the buffering mode, 1.34 mA is consumed when the monochromatic LED of the display unit 150 is turned on, When the diode is turned off, it can be seen that the consumed current is 0 mA, and the power use efficiency is increased.

As described above, according to the present invention, when a device buffered by a single-color display device is turned off after the display device is turned on for a certain period of time, the buffering indication of the device is easy to use as a monochrome display device, The manufacturing cost can be reduced.

In addition, in order to control the operation of the display device, a microprocessor is mainly used. However, in the present invention, the operation of the display device is controlled by a simple manual circuit without changing the software code, Can be used.

In addition, when switching from the buffered state to the charged state, the power supply mode is switched to the power supply mode without a delay time, and the operation state of the charging apparatus can be displayed without delay. In the buffering mode, when the light emitting diode is turned off, The power use efficiency can be increased.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular forms disclosed. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Charging device, wireless charging device
110: Power supply
120:
121: coil part
122:
130:
140:
150:
160:

Claims (11)

A power supply unit for supplying charging power;
A charging unit for transmitting the charging power from the power supply unit to an external device to be charged;
A charging controller for controlling a charging state of the charging unit;
A display unit for displaying a charged state according to the control of the charge control unit and stopping the buffer state display operation; And
And a delay unit for interrupting the operation of the display unit by interrupting the current supplied to the display unit after operating the display unit for a predetermined delay time when the charge object device is in a buffered state during recharging,
Wherein the delay unit includes a plurality of resistors, a capacitor, and a switch,
Wherein the delay time is determined by the gate-source threshold voltage of the plurality of resistors, the capacitor, and the switch.
The method according to claim 1,
Wherein the display unit is a monochromatic light emitting diode.
The method according to claim 1,
And a detecting unit for detecting a state of the charging power supplied from the power supply unit to the charging unit.
3. The method of claim 2,
Wherein the display unit emits light of a predetermined color when charging the charging object device and stops the light emitting operation when the charging object device is fully charged.
3. The method of claim 2,
The delay unit
The switch being connected in series between a cathode of the monochromatic LED and a ground which is supplied with driving power;
A first resistor connected between a first control signal of the charge control unit and a drain of the switch;
A diode coupled between a drain of the switch and the first resistor to deliver the first control signal;
A second resistor coupled between a second control signal of the charge control section and a gate of the switch;
The capacitor being connected between the gate of the switch and the second resistor; And
And a third resistor coupled between the gate of the switch and ground,
Wherein the second resistor, the third resistor and the capacitor determine the delay time together with the gate-source threshold voltage of the switch.
A power supply unit for supplying charging power;
A charging unit for transmitting the charging power from the power supply unit to an external device to be charged in a predetermined wireless manner;
A charging controller for controlling a charging state of the charging unit;
A display unit for displaying a charged state according to the control of the charge control unit and stopping the buffer state display operation; And
And a delay unit for interrupting the operation of the display unit by interrupting the current supplied to the display unit after operating the display unit for a predetermined delay time when the charge object device is in a buffered state during recharging,
Wherein the delay unit includes a plurality of resistors, a capacitor, and a switch,
Wherein the delay time is determined by the gate-source threshold voltage of the plurality of resistors, the capacitor, and the switch.
The method according to claim 6,
The charging unit
A coil part for transmitting the charging power to the charging target device according to a magnetic induction effect; And
A switch unit for controlling power supply operation of the coil unit;
And the wireless charging device.
The method according to claim 6,
Wherein the display unit is a monochromatic light emitting diode.
The method according to claim 6,
And a detector for detecting the state of the charging power supplied from the power supply unit to the charging unit.
9. The method of claim 8,
Wherein the display unit emits light of a predetermined color at the time of charging the charging object device and stops the light emitting operation at the time of charging the charging object device.
9. The method of claim 8,
The delay unit
The switch being connected in series between a cathode of the monochromatic LED and a ground which is supplied with driving power;
A first resistor connected between a first control signal of the charge control unit and a drain of the switch;
A diode coupled between a drain of the switch and the first resistor to deliver the first control signal;
A second resistor coupled between a second control signal of the charge control section and a gate of the switch;
The capacitor being connected between the gate of the switch and the second resistor; And
And a third resistor coupled between the gate of the switch and ground,
Wherein the second resistor, the third resistor, and the capacitor determine the delay time together with the gate-source threshold voltage of the switch.

Images